Alta Loma, Rancho Cucamonga, California
Alta Loma is one of three formerly unincorporated areas that became part of the city of Rancho Cucamonga, California, United States in 1977. The community is located at 34°09′N 117°36′W / 34.15°N 117.60°WCoordinates: 34°09′N 117°36′W / 34.15°N 117.60°W in the foothills of the south face of the San Gabriel Mountain range, near Cucamonga Peak and Mount San Antonio (Mount Baldy). Its ZIP codes are 91701 and 91737. Elevation ranges from 1,400 feet (430 m) to 3,000 feet (910 m). The name comes from the Spanish words for "high hill." Alta Loma had previously been known as "Iamosa".
Alta Loma is one of the more affluent areas in San Bernardino County. It is almost completely residential and, by city ordinance, no commercial business may exist above 19th Street, with the exception of several businesses already in place when the ordinance was enacted (notably at the intersection of Lemon Avenue and Haven Avenue). In addition, homes north of Banyan Street must have a minimum of 1/2 acre lots, with the exception of the development known as "Compass Rose Phase II", directly west of Chaffey College (between Banyan Street and Wilson Avenue). Compass Rose Phase II was granted permission for smaller lots provided the development connected to city sewer systems instead of septic tanks. For some reason all of the homes in Compass Rose are on septic tanks.
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